Ladeira Ary Barroso 35 , Babilonia , Leme.
From any of the 2 airports or from the main bus station you could take any bus going to Copacabana. From there (Av Atlantica and Princesa Isabel) a taxi would cost you 10 release to the door of the hostel.
The hostel is laid on a hill , so you would have to walk 7 minutes up the hill. Taxis , moto taxis and buses will leave also at the door of the hostel if you don’t feel to walk!